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This is really cool. What kind of wavelength would be needed to actually 'see' stored data inside silicon and be able to read that out?
by wcerfgba 4y ago
This is really cool. What kind of wavelength would be needed to actually 'see' stored data inside silicon and be able to read that out?
- Taniwha 4y agoIt doesn't really work that way, data in silicon is largely stored with charge - if the photons are fat enough to bounce off that charge they're also likely to erase it
- LoganDark 4y ago> if the photons are fat enough to bounce off that charge they're also likely to erase it Isn't this how EPROMS are erasable by UV light?
- Taniwha 4y agoyeah exactly
- bunnie 4y agoJust adding on to taniwha's correct comments -- it is possible to indirectly image the charge using thermal stimulation of the laser to induce the Seeback effect. The local heating will cause the current consumption of the chip to shift ever so slightly in a fashion that's dependent on the state of the transistor's bias. [1] is where I first read about the technique. [1] https://eprint.iacr.org/2018/717.pdf https://eprint.iacr.org/2018/717.pdf